ASPIRE is a quarterly magazine published by PCI in cooperation with the associations of the National Concrete Bridge Council. The editorial content focuses on the latest technology and key issues in the Concrete Bridge Industry.
Issue link: http://www.aspiremagazinebyengineers.com/i/768999
CONCRETE BRIDGE TECHNOLOGY Building High-Quality Bridges Safer, Faster, and with Less Hassle by Finn Hubbard, Fish & Associates Inc., and Adan Carrillo-Espinosa, American Association of State Highway and Transportation Officials The Second Strategic Highway Research Program 2 (SHRP2) is a partnership between the Federal Highway Administration (FHWA), the Transportation Research Board (TRB), and the American Association of State Highway and Transportation Officials (AASHTO). Under this program, SHRP2 managers facilitate the delivery of financial and technical assistance to state departments of transportation and other qualifying transportation agencies. Participants can access innovative strategies and technologies to construct and manage transportation infrastructure projects more efficiently. These products, based on extensive research, are related to improving traffic safety, identifying and preventing pavement problems, r el o c a t ing underground utilities, and speeding up the delivery of transportation projects. One of these products, Innovative Bridge Designs for Rapid Renewal, commonly referred to as the ABC Toolkit, includes standards for accelerated bridge construction (ABC) techniques and prefabricated components. This toolkit allows construction teams to build bridges faster and within safer work zones, away from vehicle traffic. This also helps to significantly reduce the travel delays motorists experience during conventional bridge construction projects. While a previous FHWA article in the Winter 2015 issue of ASPIRE™ highlighted the ABC Toolkit and several other SHRP2 products, this current article summarizes and provides lessons learned from several bridge replacement projects funded and coordinated by SHRP2 over the past three years. IR7 Gila River Bridge— Sacaton, Ariz. The Gila River Indian Community (GRIC) Department of Transportation (DOT) replaced an aging four-span Building High-Quality Bridges Safer, Faster, and with Less Hassle by Finn Hubbard, Fish & Associates Inc., and Adan Carrillo-Espinosa, American Association of State Highway and Transportation Officials bridge with a two-span, prestressed concrete girder bridge over the Gila River near Sacaton, Ariz., about 40 miles southwest of Phoenix (see Winter 2016 issue of ASPIRE). The project used ABC techniques to shorten road closures from an anticipated 4-month period to 11 days. The construction manager/general contractor (CM/GC) bidding method to allowed the GRIC DOT, the design consultant, and the general contractor to establish a partnership early in the planning and design phases of the project. New substructure elements were cast-in-place under the existing bridge in preparations to slide into place the new deck and girder superstructure. The new bridge was constructed on the new substructure and partially on temporary support assemblies. This process allowed crews to install one abutment ahead of time, within a two-day weekend closure. Once all parts of the bridge were ready, the road was closed, the new bridge span was slid into place, approach slabs were paved, and the road reopened in 9 days. GRIC DOT officials will continue to consider using ABC methods in their upcoming projects. This bridge was completed in the winter of 2015 with a total construction cost of $2,700,000. Kittery Overpass Bridge, Route 1—Kittery, Maine The Maine Department of Transportation (MaineDOT) replaced a concrete rigid frame bridge with a precast concrete beam structure. Route 1 Bridge in Kittery, Maine, located about 60 miles north of Boston, is a backup to Interstate 95 and therefore couldn’t be restricted for a long duration. The area is also a tourist destination and local business owner